Limekiln



2 Sheets-Sheet l.

(No Model.)

E. svoLvAY.

LIMEKILN.

Patented July 24, 1888.

N. prima vmmumegnprw. wmnmum n. c.

2 Sheets-Sheet 2.

(No Model.)

E. SOLVAY.`

LIMEKILN.

No. 386,665 Patented July 24, 1888.

N. PETERS. mmwumugmph", washingwn, n. c.

UNITED STATES VPATENT @trineo ERNEST SOLVAY, OF BRUSSELS, BELGIUM,ASSIGNOR TO THE SOLVAY PROCESS COMPANY, OF SYRACUSE, NE7 YORK.

LIMEKILN.

SPECIFICATION forming part of Letters Patent No. 385,665, dated July 24,1888.

Application filed March 29, IESS. Serial '.No. 268,887.

(No model.)

Patented in Belgium August 2G, ISS?, No. 7S,G72; in France August '26,1S87,No.185,507, and in England October 1, 1R57, No. 13,322.

To all whom it may concern:

Be it known that I, ERNEST SOLVAY, of Brussels, Belgium, have inventednew and useful Improvements in Limekilns, (for which Ihave obtainedpatentsin Belgium, No. 78,672, August 2G, 1887; France, No. 185,507,August 26, 1887, and Great Britain, No. 13,322, October l, 1887,) ofwhich the following, taken in connection with the accompanying drawings,is a full, clear, and exact description.

This invention relates to an improvement in limekilns; and it consistsin certain peculiarities of the construction and arrangement of thesame, substantially as will be hereinafter more fully set forth andclaimed.

In order t-o enable others skilled in the art to which my inventionpertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the accompanying drawings, inwhich- Figure l is a central vertical section of my invention, and Fig.2 is a horizontal section showing the discharging mechanism in plan.Figs. 3 and 4 are similar views of a modified form of dischargingplate.

In some cases it is found very advantageous to introduce a blast of airat the bottoni of limekilus instead of' merely using their natural draftor of drawing air into the upper part ofthe kiln-for instance, whensmall limestone is used or when it is desired to utilize refuse, 8vo.Ihavefound that this forced draft is only effective and practical oncondition that the bottom of the kiln is completely closed; and I havecombined with it a new mode of discharging the kiln mechanically, whichnot only is more regular and effective, but is more economical than handlabor.

The kiln a is of any size, material, or form most desirable, and isprovided at its bottom with a space in which the discharging andforceddraft devices are pla ced, this space being made air tight,so thatno air is admitted except that which passes through the draft-supplypipe. The forced draft is supplied through a pipe, b, which passes inthrough the bottom to the center of the kiln, and is provided on its endwith a cone, b', which extends up in the center of the kiln and servesto part and spread the charge which rests upon it. This cone is formedwith suitable openings for the passage of thc air, as clearly seen inFig. l. In this figure the cone is shown as stationary, but it may whendesirable be made to revolve. Surrounding the base of the cone is aplate, c, slightly conical in form, and provided with a horizontalannular llange, c', around its outer edge. This plate is supported uponsuitable rollers, ci, and constantly revolved by means of`- a gear, c,which is secured upon a shaft driven from any suitable motive power.

Upon the upper face ofthe plate c are a series of' tangential wings, d,which serve to gradually work the charge outward till it falls upon theannular flange c, from which it is swept by means of a wing, e, fixed tothe side of the kiln, into a hopper or receptacle, e', provided withavalve, c, at ifs bottom, which is opened at any time to discharge thecontents into wagons or other devices for carrying it away.

The charge is placed in the kiln from the top and rests upon the coneand revolving plate, and as this plate revolves the finished product atthe bottom is gradually worked to the outside and automatically andevenly discharged. This discharge insures an evenness of the product notobtainable when the discharge is made by hand, and the forced draftinsures the full and perfect burning of all small stone, refuse, Snc. 1twill be noted that the lower part of the inner wall of' the kiln isperfectly straight, so as to present no obstacles to the settling of thecharge. The mate rial is fed in at the top by means of any elevator,(not necessary to show herein,) and the operation is thus perfectlyautomatic and continuous.

In Figs. 3 and 4, I have shown a modification, in which the cone andplate are made in one, and the latter, instead of the tangent wings, isformed with a spiral shoulder, g, which serves the same purpose offorcing the material to the point of discharge. The blastpipe isconnected to this plate in a similar' manner to the first and theoperation is the same. This form is sometimes preferable when it isdesired to revolve the central cone.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination, with a liinekiln, of a revolving disk placed in thebottom of the kiln and provided with means for forcingthe lime graduallyfrom the center to the outer edge of the disk, substantially as and`forthe purpose set forth.

2. The combination, with a limekiln, of a revolving conical disk in thebottom of the kiln, having a horizontal annular iiange, tangent wingsfor forcing the material out to and upon the annular ange, and a scraperto sweep the lime off said ange at the point ofv discharge,substantially as and for the purpose set forth.

3. The combination, with a limekiln having its inner sides made verticalat the lower end, of a revolving disk in the lower part of the kiln forautomatically discharging the material, substantially as and for 'thepurpose s et forth.

4. The combination, with a limekiln havits lower end made air-tight, ofan air-blast pipe introduced into the lower end of the kiln, and havinga discharge nozzle or cone, b', con nected to the blast-pipe andextended up into the center of the charge under operation, substantiallyas shown and described.

5. The combination, with a limekiln, of a cone projecting into the lowercenter thereof and connected to an airblast, and a revolving disksurrounding the cone and adapted to continuously work the lime outwardto a discharge-point, substantially as and for the purlpose set forth.

ERNEST SOLVAY.

Witnesses:

P. LIENIENUL, T. A. FRsTENHoFF.

